import logging
from logging.handlers import SMTPHandler
from logging import Formatter
from flask import request

PROJECT = "osm-wikidata"


class MatcherSMTPHandler(SMTPHandler):
    def getSubject(self, record):  # noqa: N802
        return (
            f"{PROJECT} error: {record.exc_info[0].__name__}"
            if (record.exc_info and record.exc_info[0])
            else f"{PROJECT} error: {record.pathname}:{record.lineno:d}"
        )


class RequestFormatter(Formatter):
    def format(self, record):
        record.request = request
        return super().format(record)


def setup_error_mail(app):
    if not app.config.get("ERROR_MAIL"):
        return
    formatter = RequestFormatter(
        """
    Message type:       {levelname}
    Location:           {pathname:s}:{lineno:d}
    Module:             {module:s}
    Function:           {funcName:s}
    Time:               {asctime:s}
    GET args:           {request.args!r}
    URL:                {request.url}

    Message:

    {message:s}
    """,
        style="{",
    )

    mail_handler = MatcherSMTPHandler(
        app.config["SMTP_HOST"],
        app.config["MAIL_FROM"],
        app.config["ADMINS"],
        app.name + " error",
    )
    mail_handler.setFormatter(formatter)

    mail_handler.setLevel(logging.ERROR)
    app.logger.propagate = True
    app.logger.addHandler(mail_handler)